The diagram above is a prokaryote Escherichia Coli. State the function of the structures labelled A and B. [2]

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

The electron micrograph shows a section through a cell.

State the function of the part labelled Y.

The two images are microscopic views of similar cells.

What is a reason for the differences between the two micrographs? (upper and lower micrographs)

Tags

NGSS.HS-LS3-1

The electron micrograph shows the structures in an exocrine gland cell of the pancreas.

Identify the organelles labelled I and II on the electron micrograph and state their principal role. [4]

The image is an electron micrograph.

Determine, with a reason, whether the image is of a prokaryotic cell or eukaryotic cell.

The electron micrograph shows a palisade mesophyll cell. State the name of the structure labelled III.

Tags

NGSS.HS-LS1-5

What steps should a student follow to calculate the actual size of each bacterial cell?

• Step 1: Calculate the magnification by measuring the scale bar image ÷ actual size

  Step 2: Measure image of bacterial cell ÷ magnification

• Step 1: Calculate the magnification by measuring the scale bar image x actual size

  Step 2: Measure image of bacterial cell ÷ magnification

• Step 1: Measure the image of the bacterial cell

  Step 2: Divide the image size by the scale bar size

• He can't, it is impossible to calculate

Tags

NGSS.MS-LS1-1

Which functions of life are carried out by all unicellular organisms?

• Response, homeostasis, metabolism and growth

• Response, homeostasis, growth and photosynthesis

• Metabolism, photosynthesis, reproduction and nutrition

• Reproduction, ventilation, response and nutrition

Which characteristic of stem cells makes them useful for treating Stargardt’s disease?

• They divide by binary fission so provide sufficient cells.

• They are readily available from especially created embryos.

• They can differentiate into retinal cells.

• They transport white blood cells to the eyes.

Tags

NGSS.HS-LS1-4

Which graph represents the change in cell surface area to volume ratio with increasing cell diameter?